As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 8735, ENROUTE ANC-ENA AIR TURNBACK. DURING CLIMB OUT, THE PILOT NOTICED ERRATIC FLUCTUATIONS OF THE TORQUE GAUGE. RETURNED TO ANC. NO EMERGENCY WAS DECLARED. LANDED WITHOUT FURTHER INCIDENT. REPLACED THE TORQUE GAUGE. OPS CHECK GOOD.